{
  "manageEntity": {
    "action": "Save",
    "entityId": "2698338",
    "entityType": "Track",
    "nonce": "0x35c18ac37497bc14faf4ab647fcabbd476cf931f1dc11db72c45c68f57d25f39",
    "signature": "0x8ab2335e708b2b6ed3dff0ede9ea8a9bdefb62fa9e9fbf395891eff379dfcce8681537afa1c16b779038da30171875dbb98e0d26a2aaa5971b6b81e4bde1524c1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}