{
  "manageEntity": {
    "action": "Save",
    "entityId": "698886267",
    "entityType": "Track",
    "nonce": "0xae4baa74a8d2ca7e71b19a2f49dc985630635b2c59c6bb23026de8c3e588d255",
    "signature": "0xac4f6fae94fbd7448ede07b134b5ad649fdd34fb49422683035b2d7a24f47a20523f40f3172be5f58275a8df56fa2e70a1b865780df5e395e8591f891e095e371c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}