{
  "manageEntity": {
    "action": "Save",
    "entityId": "240313",
    "entityType": "Track",
    "nonce": "0x816af76b6b0863f4ea28d86edfa8343d964e910032bfb74f7ec99701ebb1c571",
    "signature": "0x0b8e44a64d64bbb96bc3363d6c6ff3f573564db0428c5e5795b5d9efd947c835173d65ce6a2c77f76bec7397abfad1268c77b6ec63c8a98820170d41acc6405d1c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}