{
  "manageEntity": {
    "action": "Save",
    "entityId": "655748043",
    "entityType": "Track",
    "nonce": "0x92ee59580ad3c40e9a26d2f416d754311f9bbcac621f86e95fe04e4953125ef7",
    "signature": "0xc3cc38e7ef3b8238a789f3d9fbea19c9919f08bb96eef2ca2231d03f9b1b2b6463a3a61875a4256df959265fc05a73bb91db08d57d27b9917798a14b59b21c111b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}