{
  "manageEntity": {
    "action": "Save",
    "entityId": "984509372",
    "entityType": "Track",
    "nonce": "0xadc2434c235de86b0f899745349d4324647c1881e0fd410246fe1b12484f2000",
    "signature": "0xe89f920595226052279bf78e72d387d6b265621e67eb2a39d2ce51675e3440df2caa5b382533b5faaf90dd852d74a4157e324824d4b56c57071d1705786e1a361b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}