{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801341521",
    "entityType": "Track",
    "nonce": "0x2cf238af9f5e88c02ebc537004f2f54793504568ed98087fc3bf14e8324cef5d",
    "signature": "0x452b4819c8a31e1d876d212591fd2e05f8d86fde3888abd4755b2b5c2d063bb76dfb6a55907870af9625509f292bcb97d874621a2e3dc7f9c7b7997dc442342f1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}