{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103499451",
    "entityType": "Track",
    "nonce": "0xe938e2934f2aaa054b062fdad71fa8d18e5eb5888f575132d9576c062942cee3",
    "signature": "0xc3a80bbc3c9e074bbfd3f26160076b21b7ca0b7a77f91f7fafba3fcd2464b6e52e292e7ebf66c0ec5d2c77189a1e450db30e413df24603e6e88a73f543a80b5f1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}