{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217138632",
    "entityType": "Track",
    "nonce": "0x3bf49635b107a77c87e10628577fae612299eec17cab8b0ccfa424efce4cdeb5",
    "signature": "0xca63ac5217b8ea03df7e556a91c1a0279dbdd952a24d9bc98ef06dbc806d368572597f98dc0fda163525b2d9183bb6b628b1166207b65da3c797e264a599e7c31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}