{
  "manageEntity": {
    "action": "Save",
    "entityId": "1852830538",
    "entityType": "Track",
    "nonce": "0xa17f5f7e56b6997c58a2cc7b6bdb6f22c5bc12dce1d7d0cd3abb9d1c83343a49",
    "signature": "0x6f29520119ec9e0946be4ed26521bd164e6ea6d2aec0293be4e48e389f7061f83dcd0b2774a5074b5004f7a83044ad07e1cbd5951b893e7e5a0bb16da93180101c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}