{
  "manageEntity": {
    "action": "Save",
    "entityId": "61948",
    "entityType": "Track",
    "nonce": "0x221ee5a80e341f1777fb9d8a08d3252d01bc1f995d481fe432fe93b5b7661185",
    "signature": "0x645aeeb77456084d604ca7b681a9b3e1214b4fe22cac686e4d9922d21bbf5bdb16b3bb91b74dc9ad1a1cc7ca560a7481b5b2a3645fd5355ecd5cc0ab456241801c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}