{
  "manageEntity": {
    "action": "Save",
    "entityId": "714517723",
    "entityType": "Track",
    "nonce": "0x33f3517fc191d212fb62827a6392d264ee18d5791187df61d326333b104b37b1",
    "signature": "0x7a91a65a201f096906bb43d402d7a74548365bc353552e3cad4894cdcf4d529571119ec32dcedd954f1eff7735b1ca38b15e8b5ef556ab5dbce81fdde9a3117c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}