{
  "manageEntity": {
    "action": "Save",
    "entityId": "484867445",
    "entityType": "Track",
    "nonce": "0xbc0e5cbc370006b74a5e9ebaaca5d1492315a566666ed333ba1cdf5334d00312",
    "signature": "0x33099ef52016031c44d0f358f812c69cf4e969116a5d599f5ac556c2dc4d83637c88e0ce3dc19ce1db5fd657021b1b9673fe4784bf2649d37d28ea39d9dd03231b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}