{
  "manageEntity": {
    "action": "Save",
    "entityId": "1788560850",
    "entityType": "Track",
    "nonce": "0x1e1b0cf9ba04a620a7956dd98454793e5aaceed4f218559c9c52f28f0cea6b29",
    "signature": "0x7f7b76d055718459196ccca3d8d445b3e815e8c38c6f41d01f196aefaaec13d42b3434636f05e346064da01078b7d0b2c76613d7043a6eaf654c792848c762bd1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}