{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996809432",
    "entityType": "Track",
    "nonce": "0x978b1498834c80670183d88bc0936b88505365f496d85af68389821467214d6a",
    "signature": "0x7c2cd0401feb44d737c0f1fc1815810c0065d251691ba8cf612a7ff1e046ac780db1b549549c7946ab93e4bb9d7c8131456cf0218f16c6df6319699f8981dd4c1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}