{
  "manageEntity": {
    "action": "Save",
    "entityId": "178614802",
    "entityType": "Track",
    "nonce": "0xf9c58260081f2b7bf1ed013320bb37a187b5816d4e67d5bd6572b69ab6959e62",
    "signature": "0x04614f96a6dd06ea23e5f658d0fb97b4a088f1191a4551a12a45fc4d44931373797c08fde5f2205c2fcb026126246b5f3107c0a7fcabaeb3180718e6707208381c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}