{
  "manageEntity": {
    "action": "Save",
    "entityId": "581551",
    "entityType": "Track",
    "nonce": "0xd91064d4b3d0623075ed5c1dfa057be3563cb6416824eaa63a51dee6a7ea812d",
    "signature": "0xb277f2dc195169e43ae882a338334d2754b2437da084fccb9e6c42bcf66ab92c79ad38c6a42edbfa8b66794154ddfd325633831f9f0339cc3ced0fa009a5a6f61c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}