{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125360804",
    "entityType": "Track",
    "nonce": "0xf80e6b46cc895e933f87fb56be97811fbc0a37ca5665cf258a0ab8119981a6a3",
    "signature": "0x92f5cf0425f978552da2f2c20a1c5d6809aa28bdb0e0d043066d2c351e0715a03d46a1dac18dc49b1f8b2dc5f475e6207a5aa810653420709c1504cc7175440c1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}