{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918476667",
    "entityType": "Track",
    "nonce": "0xc569d25969cb379d66501efcc94cbaf3d4d4f9762276e60ce0de5a2b9dcf44a8",
    "signature": "0xd5bfdbb1ac0b37149b6064792de7fef5f3765eefa6e226d5081cc08d6317dee61c4502789032de8e39c3dd3289f39141dff6cbc71b74c6e46dfdb775e1fe10a91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}