{
  "manageEntity": {
    "action": "Save",
    "entityId": "130619",
    "entityType": "Track",
    "nonce": "0x8dcd8de66b63fbf431a8765a415003a0ea59849538b95f88a46cd7343e5d15f1",
    "signature": "0x793b57b51830a1c3ea4ee08c92ebc54af4616ed4ea88407bf3b13b2bae6daa24030bfa6d4d40f34b5b4394fede5597b0a04bdd08b9426802b6a7d812f8474fac1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}