{
  "manageEntity": {
    "action": "Save",
    "entityId": "1320288966",
    "entityType": "Track",
    "nonce": "0xcc2255774581caee7d35044c61f1424ab3bc49e843fbcd066a707b4ff791e7e6",
    "signature": "0xf3c5aa9e51920a8271d6f8b84eed75029b6ca1b1c61d6fd09ffc9321100c046802a9552710bff95b5abd4ad1622afd89dbd90d29b271509ace3039eecb9148671b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}