{
  "manageEntity": {
    "action": "Save",
    "entityId": "215194875",
    "entityType": "Track",
    "nonce": "0xa96ca699e1fda9daa7c6d8cd27897cfe2564c93ccee36263012ce77541d4f65e",
    "signature": "0x510688f69abcc5b59d61dd0e633e88e112bf069d0474e685137699bfc6dbe72c59d2386c440aed9c05d1854566fdf118187a44a53a61ed0751fad44c9f1880931b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}