{
  "manageEntity": {
    "action": "Save",
    "entityId": "941455",
    "entityType": "Track",
    "nonce": "0x7ddce746e6a77342a689b887ad0082b70b78e9a58452d0e9fab94e1031bddd3d",
    "signature": "0xc2c8ee8b2b0ac94193846c57a01efcaaa07c9a6ce691e4b7c72d7d60f09f7d4e1334e1b5e73fba0b5693b78a54a417b16c5e3a9a527b8f125c07678a6c2408261b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}