{
  "manageEntity": {
    "action": "Save",
    "entityId": "981141006",
    "entityType": "Track",
    "nonce": "0x74ab2f6ef87e1ee45d7cc9158e7d5879a59fd26b3a39d511aa78b8bc45443d54",
    "signature": "0x79cb391bf64d12c61be855dc2eba43e5d69bb4420d87d9ce79b2b279c8388211343c938e92bdb2ea79ca18a6116c7332acfa22cd5596af6cde5bd4f02f644c361b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}