{
  "manageEntity": {
    "action": "Save",
    "entityId": "1869668244",
    "entityType": "Track",
    "nonce": "0x1a80b16a9e7bccbe2a7396d8549014b6308e9a9cd0f41d757291fbfec8bc42a2",
    "signature": "0x8184ba82d1f6b667777a349cdb82c94a11124926f459b0066b4ee21c89f7abba4226176e5f798cb9bd4071f49424c43eb5061b2af2e182f1405525eefb43ff8b1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}