{
  "manageEntity": {
    "action": "Save",
    "entityId": "629945776",
    "entityType": "Track",
    "nonce": "0x5aa6cacf9a8727e5358404eaae57620ce6a05889c45fe59ec66db0757080b126",
    "signature": "0xe56c453a117bef18f6098afa2d4c9d4779e93f04408fd9ea8ad904ac67e798e7422492e74a3bdc729c6609f4d74be460d19d8c2fafa360fb297f89828d1d8aeb1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}