{
  "manageEntity": {
    "action": "Save",
    "entityId": "2070293154",
    "entityType": "Track",
    "nonce": "0x488f16a587a9d9bbce99e94b76e8b934bf931f567052de62f6cc27b672ef9949",
    "signature": "0x3205aade19fe0cf3737a23352c67606d2fc47d0ac9b1afb852ed61364294b5ff466dbf1daac3a2c4f2b561e07ca55fed37189d5b0d954a8284421130a8b6e7211c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}