{
  "manageEntity": {
    "action": "Save",
    "entityId": "771141606",
    "entityType": "Track",
    "nonce": "0xba879db744941f4b1027972fd6c3ee8ed189a9cc038ac045651eebd249ab5028",
    "signature": "0xe6e3247745434549c3dd685bb2733d325c7c965293d058e2945425f4355ee0fd247c47dac0f4bbd7df0fc2156910abd55a71ea94193909299cfe755133a1c5221b",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}