{
  "manageEntity": {
    "action": "Save",
    "entityId": "454283",
    "entityType": "Track",
    "nonce": "0x5d016e28fb21d7cc17be9069382c369914e5e1c6920e0abada277a26c23fa5b0",
    "signature": "0xd5dbed39cac30390ce6da84c74d4685527981ba07a0fa1de172ff607cf4fc3e2218fea9b54f5036c4890cd82153af26f42b2fe013fb43b147932c2d6efeba4dd1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}