{
  "manageEntity": {
    "action": "Save",
    "entityId": "959292741",
    "entityType": "Track",
    "nonce": "0x4abaecb0cac80d2217d4570f3768ac2a8746e7586e635ed2b65b99eff7026623",
    "signature": "0x1e5f09823be6acbbfeb533be6ae33616e9d535fc98baca9839710586e4663dbd6fc6125e8ca080091b071ccbcd361c8092a2dbb766437350b6b319a96c105cbd1b",
    "signer": "0xaA2ca1cbacBF575bA565D597AD60f91610Dd25e3",
    "userId": "929684431"
  }
}