{
  "manageEntity": {
    "action": "Save",
    "entityId": "604923135",
    "entityType": "Track",
    "nonce": "0x051e4e0d7f56a99831057c66b065f4cd2d6b205f00d7a1e9e33d8252a366dcb0",
    "signature": "0x4f50ebebaa5699c3bd1754e968728e79327ecb555380b7902d2f2486b29de530297537c0103bf3087f8b7aaab494f38831f142733c6bfef98083614f9a5436041c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}