{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755496475",
    "entityType": "Track",
    "nonce": "0x9615ad49eb1eaf2e6d36ea5af9142058ca96f606a3b0f2a7ddf55cd401ee5ab0",
    "signature": "0xa74469466e4cc7fe73a97c171df2e09ec1da371161256006d1a642d16c114725632e66480f769e6d7ebe668b232e3f19f06cc2dc7ba369bf01075bd1a687d7131c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}