{
  "manageEntity": {
    "action": "Save",
    "entityId": "352272",
    "entityType": "Track",
    "nonce": "0x17e0021f4d298cfd7cff428b2f1a17690e95f3979b58e1c55a67e0db72e1f3ac",
    "signature": "0x281c09610f6e58a303a1f099ac87a226c951a1e4f0604d3183015368fd6a54af764606fd0637f423af788974591129328019f3bc825ed5ade0e28ffeefca91f21b",
    "signer": "0xD1c35F3fe36F06eA1eAC8Afaa9bA42F76fEd23A9",
    "userId": "918920591"
  }
}