{
  "manageEntity": {
    "action": "Save",
    "entityId": "1843338985",
    "entityType": "Track",
    "nonce": "0xbfbe0e28bf6a7eeab7eae7d38d70247a32c6a6bba0fa47532f2bdc37ffe05b30",
    "signature": "0x46c50fab4d4c97f4d647a64bdca4e011686252ebb9a100cc0edce673371cec4513bded0491774876c06158e1095e70a883b148fcd43413a064d92492a813867f1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}