{
  "manageEntity": {
    "action": "Save",
    "entityId": "1898020351",
    "entityType": "Track",
    "nonce": "0xe2927b9e1257cdc5811c314c950c6200ee44292c7712e297996b33f3f1457a12",
    "signature": "0xc97f85682b5456f4e2b355a55f2333dfb3b91171ca4eb3ff7b070391745599341a188edadfb486d3dd2f8fb45d548c4f33474250e311803386468919a14648bd1b",
    "signer": "0x8506BC3f7360B24a31b01F49532c54495a8e89AE",
    "userId": "167751987"
  }
}