{
  "manageEntity": {
    "action": "Save",
    "entityId": "814303",
    "entityType": "Track",
    "nonce": "0x01303f40e1fdd6b2cc42d6c5409231bcafbd22fb23c955c36f7ddaaacf48e425",
    "signature": "0x578cbe58c59ad7fedb762a91ef26a93f8e10cb5b3b9a9710d0689352d299e58e39cf9eeca5eb732dbec98f576fa824362d0483957da4887716573344f939bf561b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}