{
  "manageEntity": {
    "action": "Save",
    "entityId": "416047549",
    "entityType": "Track",
    "nonce": "0x4b84acd5c2b8d1b89d4c7282477c894c6fc745e75fab37c6484ff79be91eace4",
    "signature": "0xa929f4dacdf1733c9c91f6e46374532b955cfbaa3d52867e6f80c4c29741b2d03c913f12e2d76850d0ff50430e5b95820fbc22325345ed92c71522eee06e34ef1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}