{
  "manageEntity": {
    "action": "Save",
    "entityId": "1728034642",
    "entityType": "Track",
    "nonce": "0x12cf84cf387e6173a6347856b789bd23b011a41c5ed373f92b4357c2ed234169",
    "signature": "0x544cf6c75b2b8684c199209828cf614ff1e8d087f15d7f5e4d06f519661ccec47e1bf5389964d68bb6afbcc5d6fa01231aae2ba37b04e2e37eb47fd4e6448b161c",
    "signer": "0x38ECcB9EE00b4bf5809D1378a0E473126b01926A",
    "userId": "339278109"
  }
}