{
  "manageEntity": {
    "action": "Save",
    "entityId": "88272",
    "entityType": "Track",
    "nonce": "0x74205221ebe61372e475bf71c5e278e2566f067abbc4c440452f6054e0154de8",
    "signature": "0xe6df838205884444f0bfa2bf058698c10ab7413188abb1e56b630ce8da532b68119b2d62f011e68fdbb97ae2583eab0950fdfcb7f96477394c138008828a55e41c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}