{
  "manageEntity": {
    "action": "Save",
    "entityId": "99061862",
    "entityType": "Track",
    "nonce": "0x920b2709215781242d71be49185e72d3e6d541661568a2f93615913ac4eb28d3",
    "signature": "0x8c9b31b671dd4a9367b4dd0b2bcb8262bfcb8e5622134bbaea9f5a6f5ca315c25dd057bbb94544481aeba3a32947f93e6b40d0dc52bff0f4951fa7b74a5aa2c01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}