{
  "manageEntity": {
    "action": "Save",
    "entityId": "223606441",
    "entityType": "Track",
    "nonce": "0x1eca78f7be38f825cbad95d6abccfaaa873644fb74cba25436b8bea4b4d29858",
    "signature": "0x55052477df4842dc6e6f35794fb1bfd7bd966a662e16c0755c38439376c4493b2605f82a0e5835681a015af182c39cba79a90752216b6ad2179539f28f89e6c81c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}