{
  "manageEntity": {
    "action": "Save",
    "entityId": "873130906",
    "entityType": "Track",
    "nonce": "0x9e35e07c1578189f63a7139d6c843a14c46ee51e772b44a9c826830b1e19eebd",
    "signature": "0x5ac3483918e01585f53b41466f84a774706007d968d74aa965387499b721d41b5fbaa1dab4d7aca4114416235c941d6024d6bc7d249e6a7398f471b9ebec83fc1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}