{
  "manageEntity": {
    "action": "Save",
    "entityId": "2107892297",
    "entityType": "Track",
    "nonce": "0x7d2d3b7f94a4611c078d22de10aef1873506fd6774ae1fa9093825d4f003bfda",
    "signature": "0x9582a9bbeb7ccaaba2facd769a34b20f5c24beebbf3b7fbbb5ab90751faae7630fede99be796a263698ed4f2c764624920e686ba12bd512d35c268513ae04e651b",
    "signer": "0x6EA02C229dA9ecE0CA4a2341B6D6f5e9E32086d4",
    "userId": "4557"
  }
}