{
  "manageEntity": {
    "action": "Save",
    "entityId": "1845799161",
    "entityType": "Track",
    "nonce": "0x65da1ff7a8ddde71e5dc0250cc264ecb7b4f1d688c4f082fba28bd3adea5cbca",
    "signature": "0x4f38a1213713846ee77f518c45ef261a10d06033f2fd3a756df6514ad948a63863c885b20a987ad89e9e099038e8ba60d82515ffad140068a7efd79dcb5d8caa1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}