{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150310957",
    "entityType": "Track",
    "nonce": "0x2cf6c50402fd8df443ccae65d72d9d900f2a132df2109ac1d2e2360afdd6220c",
    "signature": "0xf7a7470b4e6d35f705073e47aba8f4456a5ba20238fbe018be2aab0855bce4fc2db4e95cf62b2af99913f1ccbf6713be5f5dfdde43d8f567cdf2e3dd154acb4b1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}