{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402717284",
    "entityType": "Track",
    "nonce": "0x03bad3a8632abcabffadbd13ecb737f52f67e382180a62a32d87ffdab828df42",
    "signature": "0x8a32d8fec549a0b9875b12e0b21b4fc33ce7ae174d500bc9b1c8a55666eb8d28241e44f6db776ae9595845131df18c22a67dce97a1a7fcaf91794d187321efff1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}