{
  "manageEntity": {
    "action": "Save",
    "entityId": "392146798",
    "entityType": "Track",
    "nonce": "0x4d6927074f7c34d66a27cd9fe296c663d66dabfe93a0d1a484ceb05a93f54ed9",
    "signature": "0x912189263ae2f768dae2cd59b4bee7344d2b7f22a87e43c39895b2599e2796487411c554c28404993f691dda671ac56ecaf79eae45e6f1c5b271198792a23b171b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}