{
  "manageEntity": {
    "action": "Save",
    "entityId": "1018805918",
    "entityType": "Track",
    "nonce": "0xadedb6cbc2d5d30ba35637b2acecd48cac670a7f44133e1164223d48fd1db889",
    "signature": "0x96136d58e1af7fe702374e926b4b0070a9c693026d671ee27f37235b13bd539c2da02c47ad832dea457489facf8037170b138147c34c3ae4666db3adc8c04b7e1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}