{
  "manageEntity": {
    "action": "Save",
    "entityId": "422762",
    "entityType": "Track",
    "nonce": "0x22c288ad893a702b07f319cd97cb75df5e52efb2b13bd9d50ca1178b6497fd9a",
    "signature": "0x3f659a03a02bce1a73a0910eb06049b5155f8c3938e370f15fbe440288afcdad1fccc0d06da714871a9068c1fc08d45b329d08aaaf2e6558e489fb1885ef916e1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}