{
  "manageEntity": {
    "action": "Save",
    "entityId": "1261555916",
    "entityType": "Track",
    "nonce": "0x38ddfa93de407f5d1f5bb27466492a92b4950368c30fd6d304efcb9f0aedf390",
    "signature": "0x7c1bd94ac6692e86277b5bc94fc7c51f2579210e619bcaae432784a5bbcdb6212e0e053a4c10e965d224f198e8e66e5940775a29bb073ea47fe5ec909b2c57721b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}