{
  "manageEntity": {
    "action": "Save",
    "entityId": "887808000",
    "entityType": "Track",
    "nonce": "0x7b16c93c957bdd1591377c649e7acb35ecf86a63e54b554a088851c067e88155",
    "signature": "0xe443ccf8d3990c0fd9040ddb779b1fc684ff8c49276d842a9db959e1ff40a91329168af90bb6bfcbd1d206f1e21b2e575f16d582dad81bc4741fd84eba97aea21c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}