{
  "manageEntity": {
    "action": "Save",
    "entityId": "1582735917",
    "entityType": "Track",
    "nonce": "0xa121d48afe6e9363006638bd57fd47014c1e9e6eebeaa1e690202a55fcb9c63a",
    "signature": "0x89551d98737aaccd1b23b0f30f15d12059078937662c0344e7648a80c5cf1f847c87f09a753749623c75b4ce93d393508e1990f5b0a68fca4753f8291ec087241c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}