{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111765155",
    "entityType": "Track",
    "nonce": "0xe68b6f47994885299fc3ae8f3ac49a2fd9dea2b1a3bbca374aefa5f7fd844dae",
    "signature": "0x72e2fd42649c6392b28aeec7dc9b45767b59b40a26df4af66da8f9a1d24b18fd1558befc16fc4270d1544551d692c99c08285e70fe2b1fcb4690f7383187ab6d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}