{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940862970",
    "entityType": "Track",
    "nonce": "0xe5686ffa3feed3780768fe53c1c9cae4310b28456c1bc0947bd9ab1a73ed1b0a",
    "signature": "0xa39becdce8071f32cfe49b8ef66a53b1b30890c7ee82a6e92a6feda0b10b9eec4ef9e07036be5e3ec28c95d69ec5974b2271bb306641b9d69bbca71fef3fd8741b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}