{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588969017",
    "entityType": "Track",
    "nonce": "0x4eb45ea87cde45f27eb074bddaee7524ef1822088826c7d069956a01c762281e",
    "signature": "0xaab1a8d51cf60c4b6c18d83e9e451a7518b0282beb7ff2f9fafc80baf8dd912c3cd559d06b52d2be25ff7050181de6211ee3bd189672518ce02da41a6e9d0d361c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}