{
  "manageEntity": {
    "action": "Save",
    "entityId": "932146895",
    "entityType": "Track",
    "nonce": "0xc087ced2d5b8c00897f67965757a92e6ae68f69b3adb3ea33f6cb072ab12812a",
    "signature": "0xfd4dca1750ae94de80240fa48e489b182dbbbfca0f6cc8d01df5d030b7e225dc05ffdb77da093faae05125051cbe8cd85613c15c94b12b1114fdecae12eb151c1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}