{
  "manageEntity": {
    "action": "Save",
    "entityId": "1949582343",
    "entityType": "Track",
    "nonce": "0x9b7c26a9be88363607b6ea5ddc7a5aec8a8f8e1270597576dbc6b0d232c49037",
    "signature": "0xa11cd35c19e9fffaa3bf1a320e6ac6523deaef7a3ec485bffde95d3e29a07256695899cf93541756ab9432ecc178cd58230b25d91e3fcaad6deb51fa7a0a3d671b",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}