{
  "manageEntity": {
    "action": "Save",
    "entityId": "187318342",
    "entityType": "Track",
    "nonce": "0x56bd5b59d99d8481bbd172a1482a07602fabbaecefb81112083fcaecb2b1dd3f",
    "signature": "0x5ec3f6e1526d1dcb582d0f5118c72f9f09add575e98d67098d10177c61f835fd6aac3ff2ac3a32fd4d38830275fb4b417bd4100027c312b747a45b704956ddb11b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}