{
  "manageEntity": {
    "action": "Save",
    "entityId": "1809616129",
    "entityType": "Track",
    "nonce": "0xc407e3a929bf08478bf61d4d0e31b5db6b291ff3e2da2953e085555ab5d59f4b",
    "signature": "0xb3a3030e5b28395140e1edab4aebdf6aa3f67aa5e1310f960d7462d7318fc3a0365359c4c35d29ea2396720a17762c793d305b468791f8f5dbb81550a938ab231b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}