{
  "manageEntity": {
    "action": "Save",
    "entityId": "1551523912",
    "entityType": "Track",
    "nonce": "0x55f05d4707e29fc852d3fd4b4323dd4c52c4eba091401677c3f6556db12218ed",
    "signature": "0x8952874edb9b1b0aeae1c8fd69deb1ef20b96019091fecfa4aba948b89a302a75a546354cba34c853b737932be714e963ef3b1ad731f9fedbd3ed28164646deb1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}