{
  "manageEntity": {
    "action": "Save",
    "entityId": "605852033",
    "entityType": "Track",
    "nonce": "0xb7eb636c9f405298e01c8cea0a747528614b06a5b7fae4fa31c93618d60911d1",
    "signature": "0xb2b1580ef1a68dff7ebff3e2684c91387d29bb651fb6bc07126c359b56ad46265d64786ed1ef37bad1736614374ebadb3ddda89b8391573f50695231fab045441b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}