{
  "manageEntity": {
    "action": "Save",
    "entityId": "1627986283",
    "entityType": "Track",
    "nonce": "0x89fee3121c4a6be001579d385f6db5956333a94df5ad4d37c2c3073068eaf5b8",
    "signature": "0x2098d758761b23716d60caf88fd5a7c52fbcad452f688770cf7a537f01d02b0678129546a622d543fd91a86c3e7979352f0e5bfd5494a0304422b5728a0ae7f41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}