{
  "manageEntity": {
    "action": "Save",
    "entityId": "675428",
    "entityType": "Track",
    "nonce": "0x66260470b0417ab84f8c6772178566bd2af614aebf2135b818485bcb11407998",
    "signature": "0x4964ca41571bb1e1d14a343c34cb3789abae0446c3b0cad3448e39aa6ef883426d1bbcf7299e7e12db5924a8b7ecc93a8b3d9148bca94beaccb2229ec183d74d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}