{
  "manageEntity": {
    "action": "Save",
    "entityId": "231146",
    "entityType": "Track",
    "nonce": "0xcb1c3d9a7db34e265a856039fac5d96cd4051155509c9fb6def6819c86415685",
    "signature": "0x3ecd0bd4b2c6ad6963fb9658250a60e8ff433f1e24b6f3a0b164c37624813d067e126d1226cd5203f513a6855cca2233d044c0ceef334e2fb74e1d5a02033cf31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}