{
  "manageEntity": {
    "action": "Save",
    "entityId": "673630982",
    "entityType": "Track",
    "nonce": "0x0d51579c627c2582077013487dd776dd95d78999af1043408c58e366b4956ec8",
    "signature": "0xc3626aa5ba0949213554035fd48aff68457c1364874ee1be782d57dd99d037b637effc9b7da99d33ed87afc8f064beba844057635b6447582e15a49ccf53da461c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}