{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017719",
    "entityType": "Track",
    "nonce": "0x737df0c1f2c9a16a3d187b8c01c592ed4dae9e9a6ef102e10e294d128cb79259",
    "signature": "0x87d53b102d014d7633b1aaa70f493bad0af4f670006220a925557a7db795a39f204150bf5f2a5284310df14391c750adc00b0f98782d8cc232589749092f96fe1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}