{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915499571",
    "entityType": "Track",
    "nonce": "0xb4758fd36134fddb28b1729899275a3ee7f4617c2f63925c6aa74c7b989e7f60",
    "signature": "0x4f656c2d82eb7fd6d5dab53d3edc13fe4f7622a8de1814985cc1798ee4b0c230691e5c7e4e1e45b48f575daf5d04cf5651c57a431f5adfe24000e4a954d510f61c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}