{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942940841",
    "entityType": "Track",
    "nonce": "0x0f6d90b1225ee68a45e2ec14407e7721c1fa81eef31aa11029499302c35cacb0",
    "signature": "0x97e38268185f17b7541d261ffb21249c2b3375ca02d7d20dd22d2e9da6d88c945a06c2fb7056979410a9ffde4206fc7a2e26b6504e8d77a1b8ad612ad26046ab1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}