{
  "manageEntity": {
    "action": "Save",
    "entityId": "370061764",
    "entityType": "Track",
    "nonce": "0xdcc2c635efd96b48da8fa3d790bed20067967930184bb104a83d06a439232a4e",
    "signature": "0x0cf2f452e2f92b50afc2bf6dbba95cadb364b3debe82f952e9bd96e6b0e8ba7f28e8a9e367c7969516f78a62f28a76161c7216261c4059f6c2619d4c8deb1e791c",
    "signer": "0x6f2E856bAE9D99f862016d2a2A444B395a759F47",
    "userId": "206867145"
  }
}