{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357257619",
    "entityType": "Track",
    "nonce": "0xac663f423a7d49cd8b1810125236f35f8750cbc749912d7ef61ba8af5a706b13",
    "signature": "0xc9acecf6b62ef3e249b7b41611cc8ef79e1d6418a9e7bc6d04909423d669dc1d3f846ab57152fcfa32611d4855cfab25a07540f732277a920fecd566cc4a180e1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}