{
  "manageEntity": {
    "action": "Save",
    "entityId": "540175",
    "entityType": "Track",
    "nonce": "0xa275f2f63dab9872651498c5dc59d21508ac99f649476151729c97ce2c260a2f",
    "signature": "0xcd49b24b2437161b620dc8438bdbccf8e829f7b064843319d1aa83e257ee280957c41d53da4304c1da2d820c92823dd20bbdab6cb57116542b5b0631924cac7b1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}